Mannō Lake (満濃池, Mannō Ike) is a man-made irrigation reservoir with a reserve capacity of 15.4 million tons, located in the town of Mannō, Kagawa, Japan, on the island of Shikoku. It is vaguely shaped like a human hand. Around the lake is a forest of Japanese red pine, sawtooth oak, and konara oak, and 75 species of birds, including goshawks and sparrowhawks, as well as 12 species of wild animals, including Japanese squirrels. Due to the importance of the habitat, Kagawa Prefecture has designated 321 hectares as a wildlife sanctuary.
Data
- Dam type: Earth-filled storage dam
- Dam height: 32.0m
- Dam length: 155.8m
- Shore length: 19.7km
- Water volume: 15,400,000 cubic meters
- Waterbody surface area: 342.2 acres
- Basin surface area: 348.9 acres
- Catchment area: 8004 acres
- Tributaries: Kanakura River, Doki River (via the Tenkawa Headrace)
- Dam height: 22m
- Shore length: 10.58km
- Waterbody surface area: 200acres
- Water volume: 5,000,000 cubic meters
- Tributaries: Kanakura river
- Dam height: 22.72m
- Dam length: 81.81m
- Shore length: 8.2km
- Regions supplied with water: 128.704 square kilometers between Naka-Gun, Uta-Gun, and Tado-Gun
- Tributaries: Kanakura river
- First embankment construction water volume: 6,678,000 cubic meters
- Second embankment construction water volume: 7,800,000 cubic meters
- Third embankment construction water volume: 15,400,000 cubic meters
Yuru-Nuki
A "Yuru" is a water reservoir plug. The Yuru-Nuki ceremony, which is held on annually on June 15 at Manno Pond, releases water to irrigate fields for the rice-planting season.
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